2021 April 19 - Asteroid occultation event

Exoplanet occultation, asteroid occultation,
solar research, comet observation, astrometry, etc.
回覆文章
PTS
夸克星
文章: 17242
註冊時間: 週日 28 10月, 2007 08:50
來自: HK

2021 April 19 - Asteroid occultation event

文章 PTS » 週五 05 3月, 2021 23:44

2021 April 19 - Asteroid occultation event

(63) Ausonia / UCAC4 291-116838 event on 2021 Apr 19, 18:07 UT

I've prepared finder charts from DSS and The Sky 6.
----------------------------------------------------------------------------
Summary
-------
On 2021 Apr 19 UT, the 99.6 km diameter asteroid (63) Ausonia will occult a
12.0 mag star in the constellation Scorpius for observers along a path across W
Australia, China.

In the case of an occultation, the combined light of the asteroid and the star
will drop by 0.30 mag to 10.77 mag (the magnitude of the asteroid) for at most
31.8 seconds.

This update is based on, astrometry for the asteroid kindly provided by the IAU
Minor Planet Center.

This work has made use of data from the European Space Agency (ESA)
mission Gaia (http://www.cosmos.esa.int/gaia), processed by the
Gaia Data Processing and Analysis Consortium
(DPAC, http://www.cosmos.esa.int/web/gaia/dpac/consortium).
Funding for the DPAC has been provided by national institutions, in
particular the institutions participating in the Gaia Multilateral Agreement.

The event at a glimpse
----------------------
* Rank: 99
* date and approx. time of event: 2021 Apr 19, 17:33 - 2021 Apr 19, 18:41
* geocentric midpoint of event [JD]: 2459324.25496667
* magnitude of target star: 12.00
* magnitude drop [mag]: 0.30
* estimated maximum duration [s]: 31.8
* Moon: 45 % sunlit, 145° distance
* Sun: 131° distance
* rough path description: W Australia, China

Additional comments
-------------------
low mag drop

The occultation path
--------------------
* approximate projected width [km]: 102
* 1 sigma uncertainty interval [path widths]: +/- 0.21
* 1 sigma uncertainty interval [seconds]: +/- 12.5
* 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.019, +/- 0.042)
* 1 sigma uncertainty ellipse (major, minor, PA): (0.042", 0.019", 177°)
* approx speed of asteroid's shadow [km/s]: 3.1282
* website for maps:
http://www.asteroidoccultation.com
您沒有權限檢視這篇文章所附加的檔案。

PTS
夸克星
文章: 17242
註冊時間: 週日 28 10月, 2007 08:50
來自: HK

Re: 2021 April 19 - Asteroid occultation event

文章 PTS » 週日 18 4月, 2021 21:53

Reminder

回覆文章

回到「業餘天文研究專區 Amateur Astronomers' Research Area」

誰在線上

正在瀏覽這個版面的使用者:沒有註冊會員 和 11 位訪客